Where the data comes from

Every answer on this site is derived from vendor and project sources, not written by hand. This page lists those sources, the rules applied to them, and the limits. Every entry also carries its own sources in its notes.

Sources, by dataset

The rules the answers use

What this site doesn't do

Use the data

Every dataset is available as JSON: see download the data.

When something is wrong

Use "Report an error on this page" at the bottom of any page. Every correction is recorded in thecorrections log (7 so far), with what the site said before and what it says now.